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Thread: 1972-1981 (E12) knowledge base

  1. #226
    Join Date
    Jul 2016
    Location
    Vanderbijlpark, ZA
    Posts
    246
    My Cars
    '99 Z3 2.8 Roadster
    Quote Originally Posted by LazyE12 View Post
    Hey y’all! I know there’s not much on the E12 thread, but I’m picking up a 81 E12 5spd in a couple weeks. The brake booster needs replacing, is there a guide in which to do this properly. It’ll be my new daily since my subaru is just a liability.
    Nice. And also welcome.

    If it's anything like the RHD E12/8 that I had, replacing the booster should be easy. In my car it was not mounted to the firewall, but on a bracket further to the front. Believe me, replacing a booster that's mounted on the firewall can be a pain unless you have extremely small hands, and extremely long fingers.

    Basically if you can reach all the bolts/nuts it'll be easy. No bleeding required since you're not touching any hydraulics, and you simply have to remove it, bolt the new one in, and bolt the master cylinder and pedal linkage to the booster.

    Oh, and be sure to post some pictures once you have it. This thread can do with more pictures.
    1999 BMW Z3 2.8 Roadster - show project
    1970 VW 411L Auto - show/restoration project (sold)
    1982 BMW 518i E12/8 - stolen
    1987 Mazda 323 1.5 SL - daily driver, backup show car

  2. #227
    Join Date
    Jan 2017
    Location
    Lebanon
    Posts
    40
    My Cars
    1980 bmw 520/e12/6cylind
    Hello, so i have a question....which intake manifold is better the old e12 528i intake manifold old style runners? Or the later e28 528i intake manifold? Im currently running the old style but i have the e28 one on the ready with the wiring harness and everything. So which one is better?

  3. #228
    Join Date
    Jan 2004
    Location
    WA
    Posts
    60
    My Cars
    1975 530i 4 speed
    Quote Originally Posted by Bibiguy97 View Post
    Hello, so i have a question....which intake manifold is better the old e12 528i intake manifold old style runners? Or the later e28 528i intake manifold? Im currently running the old style but i have the e28 one on the ready with the wiring harness and everything. So which one is better?
    The old style e12 manifold is better for performance. The e28 intake was developed to maximize torque and fuel economy. Some e28 owners have put the e12 intake on their cars! The e28/e34 M5 intake is also like the old e12 log style.

  4. #229
    Join Date
    Jan 2017
    Location
    Lebanon
    Posts
    40
    My Cars
    1980 bmw 520/e12/6cylind
    Okay then imma stick with the e12 manifold
    Thank you for the insight🤗

  5. #230
    Join Date
    Jan 2017
    Location
    Lebanon
    Posts
    40
    My Cars
    1980 bmw 520/e12/6cylind
    Hello i have a question
    I recently changed my brake booster and master cylinder with used ones yet my pedal starts to respond halfway through. Is it normal? Mind you i have no leaks whatsoever . Its just that my friends car has the same booster yet his brake pedal responds way up and this would happen on any brake booster i'd throw in it (i changed 3 boosters until i got the big brake booster from an automatic donner car).
    Any insights would be helpful

  6. #231
    Join Date
    Mar 2005
    Location
    Cleveland OH, USA
    Posts
    142
    My Cars
    2002, 912, 530i, X5 35d
    Just bought this 77 530i. Runs, drives, and stops. The parking brake even works.
    One owner car and garage kept. It’s not the cleanest example but not too bad. I’ve been on a buying spree of suspension, wheels and tires etc.
    499DF0C9-64B0-4C73-90FF-85C72AE1FB17.jpeg

    A2FA63A0-47B0-43FB-B6AB-12B77C6027E1.jpeg

    0DD07873-B8BA-49F9-AA80-CA774B12A643.jpeg

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    John
    It will always be better to be shot out of a cannon than to be squeezed out of a tube.

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